22012021112221 has 32 divisors (see below), whose sum is σ = 26508979365120. Its totient is φ = 17855295782400.

The previous prime is 22012021112201. The next prime is 22012021112281. The reversal of 22012021112221 is 12221112021022.

It is not a de Polignac number, because 22012021112221 - 2¹⁹ = 22012020587933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012021112201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 490037455 + ... + 490082371.

It is an arithmetic number, because the mean of its divisors is an integer number (828405605160).

Almost surely, 2^{22012021112221} is an apocalyptic number.

It is an amenable number.

22012021112221 is a deficient number, since it is larger than the sum of its proper divisors (4496958252899).

22012021112221 is a wasteful number, since it uses less digits than its factorization.

22012021112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48805.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22012021112221 its reverse (12221112021022), we get a palindrome (34233133133243).

The spelling of 22012021112221 in words is "twenty-two trillion, twelve billion, twenty-one million, one hundred twelve thousand, two hundred twenty-one".